CORRELATION DOUBLE SAMPLING DEVICE

申请公布号：

JPH09190699(A)

申请号：

JP19960322007

申请日期：

1996.12.02

申请公布日期：

1997.07.22

申请人：

SAMSUNG ELECTRON CO LTD

发明人：

KUUON HIYOKUCHIYURU

分类号：

G11C27/02;H04N5/30;H04N5/335;H04N5/357;H04N5/363;H04N5/372;H04N5/378;(IPC1-7):G11C27/02

主分类号：

G11C27/02

摘要：

<p>PROBLEM TO BE SOLVED: To efficiently eliminate sampling noise by DC-clamping a video signal outputted from an image sensing means and impressing it to a saple-and-hold circuit. SOLUTION: Output signals of a second and a third sample-and-holds circuits 12 and 14 are inputted to a first and a second level correction units 26 and 28 respectively to correct the DC level between the input and output of each sample-and-hold circuit. In this case, the first level correction unit 26 makes output of the second sample-and-hold circuit coincide with DC output of a fourth sample-and-hold circuit 30, and makes the second level correction unit 28 coincide with DC output of the third sample-and-hold circuit 32 before inputting the output signal to the first and second noise reduction units 36 and 38 respectively.</p>